Abstract
A reproduction analysis from a view point of practical design was conducted on a case history where a high railway cut slope consisting of clayey soils failed during the 2011 Off the Pacific Coast of Tohoku Earthquake. The extent of the damage was so large that its restoration works required significant time.
Therefore, a series of in-situ geotechnical survey and laboratory soil testing on undisturbed samples were conducted, and a two-dimensional earthquake response analysis was executed while considering the strong motion record that was observed nearby. Based on the laboratory test results, the properties of strength reduction to be mobilized along a failure plane were also formulated, and earthquake-induced sliding displacement was evaluated using modified Newmark method. As a result, the damage extent of the failed slope could be reasonably simulated.
